package cn._51doit.flink.day03.transformations;

import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.tuple.Tuple;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.KeyedStream;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

public class KeyByDemo2 {


    public static void main(String[] args) throws Exception {


        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        //spark,4
        //hive,5
        DataStreamSource<String> lines = env.socketTextStream("localhost", 8888);

        //对数据进行映射
//        SingleOutputStreamOperator<Tuple2<String, Integer>> wordAndOne = lines.map(new MapFunction<String, Tuple2<String, Integer>>() {
//            @Override
//            public Tuple2<String, Integer> map(String line) throws Exception {
//                String[] fields = line.split(",");
//                String word = fields[0];
//                int count = Integer.parseInt(fields[1]);
//                return Tuple2.of(word, count);
//            }
//        });
//
//        //对数据按照key进行分区
//        //按照封装数据的pojo的字段名称进行keyBy
//        KeyedStream<Tuple2<String, Integer>, Tuple> keyedStream = wordAndOne.keyBy("f0");

        SingleOutputStreamOperator<WordCount> wordAndCount = lines.map(new MapFunction<String, WordCount>() {
            @Override
            public WordCount map(String line) throws Exception {
                String[] fields = line.split(",");
                String word = fields[0];
                int count = Integer.parseInt(fields[1]);
                return new WordCount(word, count);
            }
        });

        //KeyedStream<WordCount, Tuple> keyedStream = wordAndCount.keyBy("word");

        KeyedStream<WordCount, String> keyedStream = wordAndCount.keyBy(WordCount::getWord);

        keyedStream.print();

        env.execute();




    }

    public static class WordCount {

        private String word;

        private Integer count;

        public WordCount(){}


        public WordCount(String word, Integer count) {
            this.word = word;
            this.count = count;
        }

        public String getWord() {
            return word;
        }

        public void setWord(String word) {
            this.word = word;
        }

        public Integer getCount() {
            return count;
        }

        public void setCount(Integer count) {
            this.count = count;
        }
    }


}
